Seiko Ōmori

is a Japanese singer-songwriter. Her musical career began in the underground music culture of Tokyo's Kōenji neighborhood, briefly playing in the punk band Kuchuu Moranko before going solo and releasing two independent albums until signing with major record label Avex Trax in 2014. Oomori's music style is influenced by idol culture and punk rock among other clashing musical styles, and she is considered one of the early pioneers of the "anti-idol" and alternative idol scenes led by groups like BiS that would eventually give way to the more popular Kawaii metal movement, utilizing shock value and performance art throughout the early parts of her career.

Career Born in Matsuyama, Ehime Prefecture, Oomori moved to Tokyo to attend Musashino Art University in Kodaira. Oomori performed in one of Kōenji's "live houses" named Muryoku Muzenji, singing while playing an acoustic guitar. Oomori held multiple concerts within Tokyo, including a first appearance at the 2013 Tokyo Idol Festival, a venue she would continue to appear in. Her growing popularity attracted the attention of Avex Trax to offer a contract in 2014.

Oomori's first album with Avex Trax, Sennō, sees her depart from her guitar-wielding "anti-idol" image to explore other types of music by incorporating more electronic elements, but her lyrics still explore darker themes, similar to Avex Trax's other band BiS. On 9 June 2021, ZOC released their first album PvP, a double-album produced by Oomori herself with additional contributions from Kenta Sakurai, the producer of now-defunct idol group Maison Book Girl. Later that year on 9 November, ex-BiS and Maison Book Girl member Megumi Koshouji debuted her new idol group MAPA with the full-length album Shitennou, produced entirely by Oomori.

Personal life Oomori announced in 2014 that she had gotten married, although she did not specify to whom. In 2020 she publicly revealed her husband's identity as Pierre Nakano of Ling Tosite Sigure, also the long-time drummer in her backing band. The couple have one son, who was born in 2015. On 18 August 2024, the day that would have been their tenth wedding anniversary, the couple announced their divorce through their respective social media accounts.

Discography Studio albums + Title Album details PeakpositionJPN JPNComb JPNHot Released: 20 March 2013 Label: Pink RecordsReleased: 11 December 2013 Label: Pink Records 53Released: 3 December 2014 Label: Avex Trax 18Tokyo Black HoleReleased: 23 March 2016 Label: Avex Trax 19 22KitixxxgaiaReleased: 15 March 2017 Label: Avex Trax 10 25Released: 11 July 2018 Label: Avex Trax 9 12KintsugiReleased: 9 December 2020 Label: Avex Trax 13 45超天獄 (天 ver.)Released: 26 October 2022 Label: Avex Trax 24 42This Is Japanese GirlReleased: 18 September 2024 Label: Avex Trax 29 26 "—" denotes a recording that did not chart or was not released in that territory.

Extended plays +Title Album detailsPink15 April 2012 Pink Records

Compilation albums +TitleAlbum detailsPeakPositionJPN JPNHot 2014 178 20 322015 20 492016 26 93 51"Positive Stress" 51 26"Draw(A)Drow"2017 302019 24 35 19 41 "—" denotes a recording that did not chart or was not released in that territory.